Kyle

Since elves live for thousands of years, being a "slave" is like a part-time and temporary job; for elves, the lifespan of a human is too short, and serving humans is only a few years for them.

Marie Fou Lafan (Master)
Kyle describes Marie as a "spoiled Master"; he often serves her food with vegetables on purpose because he knows she doesn't like vegetables.

Yumeria (Mother)
Kyle cares for his mother. While Kyle often comes off as rude and harsh towards his mother, this behavior is stemmed from a genuine worry about her gullible nature and concern for her well being. He often behaves more like the adult in their relationship.

Leon Fou Bartfort (Enemy)
Kyle hates Leon because he considers him an ignorant idiot who doesn't know anything. He acknowledges Leon's accomplishments, but that doesn't give him the right to be such an arrogant jerk.

Kyle was bought by Julius and Jilk as a personal servant for Marie, when they had heard that she didn't had any servants with her. He makes his official appearance during the End-of-Term Party, when Angelica challenges Marie to a duel. The next day after the party, Kyle goes to Marie's room with her breakfast and reports the current situation to his master. He tells her that they had gotten permission to use the arena and their opponent, Leon, had average marks so it should be an easy win for them.

He was present when the The Prince's Entourage lost against Leon and when they were disowned by their households during the summer vacation. Kyle, with Marie and the Prince's Entourage, spend the rest of their vacation challenging the dungeon countless times.

He is a pragmatic, cynical, and independent person. He doesn't trust anyone other than his master, Marie and his colleague Carla. Despite his current standing as a butler, he's still showing some hint of his rebellious state when it comes to his mother and how he acts like a child in front of his friends.

He has a lime short curly hair, pointed sharp ears, and a cute face of his age. He is always shown wearing his servant attire.

He seems young but he is like 100 years old.